Home / 2,661.73-3,988.48-1,685.78

Finding the Fourth Proportional to 2,661.73, 3,988.48 and 1,685.78

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Solution

The fourth proportional to 2,661.73, 3,988.48 and 1,685.78 is: 2,526.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,661.73 : 3,988.48 = 1,685.78 : x
  2. Step 2: Convert to fraction form
    2,661.73/3,988.48 = 1,685.78/x
  3. Step 3: Cross multiply
    2,661.73x = 3,988.48 × 1,685.78
  4. Step 4: Simplify right side
    2,661.73x = 6,723,699.81
  5. Step 5: Solve for x
    x = 6,723,699.81/2,661.73
  6. Step 6: Final answer
    x = 2,526.06

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.